Diode laser overtone spectroscopy of CO2 at 780 nm

Year: 2005

Authors: Lucchesini A., Gozzini S.

Autors Affiliation: CNR – IPCF, Area Area Ric, Via G Moruzzi 1, I-56124 Pisa, Italy

Abstract: Overtone absorption lines of (CO2)-C-12-O-16 have been examined by using a tunable diode laser (TDL) spectrometer in the region around 12770 cm(-1). The spectrometer sources are commercially available double heterostructure InGaAlAs TDLs operating in the \”free-running\” mode, which allowed the detection of the line positions within 0.01 cm(-1). The observed carbon dioxide absorption lines belong to the v(1) + 5v(3) ro-vibrational band with rotational quantum number J up to 48. The minimum absorbance detected by the spectrometer (similar or equal to 5 x 10(-6)) permitted to observe the weakest lines having the absorption cross section of the order of similar or equal to 1 x 10(-27) cm(2)/molecule.


Volume: 96 (2)      Pages from: 289  to: 299

KeyWords: spettroscopia molecolare; monitoraggio ambientale; diodi laser; anidride carbonica;
DOI: 10.1016/j.jqsrt.2005.03.005

Citations: 10
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